I am new to this game and been playing it for a few weeks now, but recently me and my mate reached level 30 and went to go and do some side missions in media luna, that has not gone well, unidad just keep on coming and when you do eventually kill everyone the missile defence systems in this area are ridiculous, anyone else have issues in this area?
Media Luna is Unidad territory; it's meant to be tough.
With so many SAM sites, if you insist upon using a helo, learn to fly-nap-of-the-earth.
Seriously, in Media Luna you have to change up your tactics a bit from what the game allows you to do in most of the other provinces outside the main Unidad base(s) in Flor de Oro.
There's 3 strategies in Media luna.
1. Fly a couple of inches off the ground..
2. Keep above the range of the miissile batteries (500+ metres)
3. Drive (Definitely recommended in my opinion - you should make a point of driving through every region at least once as there's so much detail you'll miss by sticking to the helicopters)